30971481 has 8 divisors (see below), whose sum is σ = 42255840. Its totient is φ = 20167392.

The previous prime is 30971477. The next prime is 30971483. The reversal of 30971481 is 18417903.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30971481 - 2² = 30971477 is a prime.

It is a super-2 number, since 2×30971481² = 1918465270666722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (30971483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119916 + ... + 120173.

It is an arithmetic number, because the mean of its divisors is an integer number (5281980).

Almost surely, 2^30971481 is an apocalyptic number.

It is an amenable number.

30971481 is a deficient number, since it is larger than the sum of its proper divisors (11284359).

30971481 is a wasteful number, since it uses less digits than its factorization.

30971481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240135.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 30971481 is about 5565.2026917265. The cubic root of 30971481 is about 314.0417033877.

The spelling of 30971481 in words is "thirty million, nine hundred seventy-one thousand, four hundred eighty-one".